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title: Raspberry 5 baremetal detect board
keywords:raspi5,asm,c,kernel,arm64
# Raspberry 5 baremetal detect board
Baremetal code snippet on how to detect what raspi board you are running on
```c
int get_raspi_board()
{
unsigned int reg;
int ret=0;
/* read the system register */
#if __aarch64__
asm volatile ("mrs %x0, midr_el1" : "=r" (reg));
#else
asm volatile ("mrc p15,0,%0,c0,c0,0" : "=r" (reg));
#endif
/* get the PartNum, detect board and MMIO base address */
switch ((reg >> 4) & 0xFFF) {
case 0xB76:
ret=1;
break;
case 0xC07:
ret=2;
break;
case 0xD03:
ret=3;
break;
case 0xD08:
ret=4;
break;
case 0xD0B:
ret=5;
default:
break;
}
return ret;
}
```
## Links
[1] https://wiki.osdev.org/Detecting_Raspberry_Pi_Board
[2] [/writeup/raspberry5_baremetal_helloworld.md](/writeup/raspberry5_baremetal_helloworld.md)
[3] https://github.com/DSERIOUSGUY/HobOS/blob/main/mmio.c
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